444223981 has 4 divisors (see below), whose sum is σ = 447205500. Its totient is φ = 441242464.

The previous prime is 444223979. The next prime is 444223993. The reversal of 444223981 is 189322444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38564100 + 405659881 = 6210^2 + 20141^2 .

It is a cyclic number.

It is not a de Polignac number, because 444223981 - 2¹ = 444223979 is a prime.

It is a super-2 number, since 2×444223981² = 394669890590976722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 444223981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444223181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1490536 + ... + 1490833.

It is an arithmetic number, because the mean of its divisors is an integer number (111801375).

Almost surely, 2^444223981 is an apocalyptic number.

It is an amenable number.

444223981 is a deficient number, since it is larger than the sum of its proper divisors (2981519).

444223981 is a wasteful number, since it uses less digits than its factorization.

444223981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981518.

The product of its digits is 55296, while the sum is 37.

The square root of 444223981 is about 21076.6216695181. The cubic root of 444223981 is about 763.0166236765.

The spelling of 444223981 in words is "four hundred forty-four million, two hundred twenty-three thousand, nine hundred eighty-one".